Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
A house full, a yard full, a chimney full, no one can get a spoonful.
What always goes to bed with his shoes on?
You heart it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung.
With head without hair. With mouth without tooth.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?